Holder for reaming-tools



(No Model.)

J. S. WINSOR, Jr.

HOLDER FOR REAMING TOOLS.

No. 366,908.. Patented July 19, 1887.

Jimm

N. FEYERS. Pbolo-Lihographan Waahingtcn. bc.

UNITED STATES PATENT OFFICE.

JOSEPH SPRAGUE VINSOR, JR, OF YVOROESTER, MASSACHUSETTS.

HOLDER FOR REAM-ING-TOOLS.

SPECIFICATION forming part of Letters Patent No. 366,908, dated July 19, 1887.

Application filed March 526, 1887.

To aZZ whom it may concern:

Be it known that I, .Tosnrrr SPRAGUE WIN- SOR, J r., of the city and county of \Vorcester, of the Commonwealth of Massachusetts, have invented a new and useful,Improvement in Beaming-Tool Holders; and I do hereby declare the same to be described in the following specification, and represented in the accompanying drawings, of which Figure l is a side view, Fig. 2 a rear end view, and Fig. 3 a longitudinal and median section, of a self -centering reamer and its holder 01'' my invention, the nature of which is defined in the claim hereinafter presented. Fig. 4 is a side view of the spanner. Fig. 5 is a rear end view of the reamer, and Fig. 6 is an inner end view of the cylindrical block E and its pivot.

In such drawings, A denotes the reamcr, which at a short distance from its cuttinghead a is channeled or grooved transversely, as shown at as, to receive a ring section or spanner, B, a side view of which is represented in Fig. 4. The said spanner clasps-the reamershank s, which is inserted within a tubular carrier, C, until the spanner bears against or nearly touches the front end of such carrier, a cap, 1), through which the shank also goes, being screwed upon the said carrier at its front end. At its rear end the shank has a prismoidal projection, Z), extending from it, and in the central part of such projection there is a conical recess, 0, to receive a conical pivot, (7, extending from a cylindrical block, E,inserted and fixed firrnlyin the rear end part Serial No. 232,596. (No model.)

of the carrier 0. This block is slotted diametrically to receive the projection b, and with it operates to prevent the rcamer from revolving within the carrier.

The shank of the rcainer has a diameter somewhat less than that of the bore of the carrier 0 and the central hole, (1, in the cap D, through which the shank passes. The diameter of the spanner is also somewhat less than that of the chamber f of the cap, the whole being to allow of the stock vibrating a little within the carrier, as occasion may require, for the reamer to properly adapt itself to a hole to be reamed. The reamcr may thus be termed sclfadjusting or centering, when the carrier is firmly held in and revolved by a lathc-arbor or other means usually employed for putting it in revolution.

I claim The combination of the tubular carrier 0, the cylindrical block E, provided with the conical pivot and the diainetric slot and in serted and fastened in such carrier at its rear end, the cap screwed upon the front end oi'such carrier, the reamcr A, grooved transversely in its shank and tern'linating at its rear end in the prismoidal projection b, provided with the conical recess 0, and the spanner 13, inserted in the groove of the shank, all being substantially as set forth.

JOSEPH SPRAGUE WINSOR, .llt.

\Vitnesses:

Minion H. OowDEN, THOMAS McOAI-trnr. 

